Method of forging metal bars



(No Model.) I

.e. F. SIMONDS.

' METHOD OF FORGING METAL BARS. No. 319,755.. 16 Patented June 9 1885.

WITNESSES: y I v INVENTOR Y W BY fi. fillmflzz. g

ATTORNEY NITED STATES PATENT Prion.

METHOD OF FORGING METAL BARS.

SPECIFICATION forming part of Letters Patent No. 319,755, dated June 9,1885, Application filed November 22, 1884. (No model.)

To aZZ whom, it may concern:

Be it known that I, GEORGE F. SIMoNDs, of Fitchburg, in the county ofWorcester and State of Massachusetts, have invented certain improvementsin die-faces for platens to work and shape metal articles, and a new andimproved method of working metal to form articles; and I hereby declarethe following to be a full, clear, and exact description thereof,reference being had to the accompanying drawings, making part of thisspecification, in which- Figure 1 are perspective views of a platenprovided with my improvements. Figs. 2, 3, and 4 are sectional detailsand illustrations of the work.

My invention relates to platens having diefaces, which are reciprocated0n the surfaces of metal articles to give them any predetermined shapeor size dependent upon the configuration of the die-faces, and has forits objcct to reduce the length of the platen to a minimum andnecessitate only a short travel to accomplish the desired result. Myinvention also consists in a novel method of shaping or forging metal,all of which will be hereinafter fully described and claimed.

In order that those skilled in the art may make and use my invention, Iwill proceed to describe the manner in which I have carried it out.

In the said drawings, Ais the platen, provided with three raisedforming-surfaces, a b d,cach composed of three intersecting convergingplanes, after the manner described in my application filed June 16,1884, Serial No. 135,014. This construction of the workingfaces providesthree devices or agencies,which simultaneously commence work at e f g onthe blank or ingot, and continue to work simultaneously,spreading themetal from four points outward until the operation is completed. Theworking-faces hi spread the metal from the center, and the working-facesk l start the metal toward the ends of the blank and spread it from' thepoints 6 g on each side of the center of the blank, where they commenceto engage the heated metal.

In Fig. 2 is illustrated the progression in change of form given aningot or bar when it has been traversed by the platens to the line shownin the sectional view of the same figure. Fig. 2 illustrates the furtherchange of form or spreading of the metal at the transverse line shown inthe sectional view of the same figure. I

The working-faces Z13 h k pitch diagonally from the surfaces at b d, andare provided with grooves or irregularities t t, to engage the plasticmetal and insure it turning on its axis as the platens pass over itssurface. The faces 0 p are vertical planes,and do not perform thefunction of spreading, and the proportions of the working-faces are soarranged and measured that by the time the platens have traversed thework to the points where faces 0 11 and p h merge the metal which wasstarted from the center f, or the offsets due to crowding it toward theends, will merge with and pass into the reduced size or changed shapecommenced at e and g, and the work passes into contact with thefinishing-surface B of the platen without cold shuts or like defects.

Having thus described my invention, what I claim as new, and desire'tosecure by Letters Patent, is-

The improved method herein described of forging or rolling metalarticles, consisting in treating the bar, ingot, or fagot at two or morepoints simultaneously, to change itsform and spread the metal toward itsends, substantially as described.

GEO. F. SIMONDS. Witnesses:

R. K. EVANS, H. S. DOWNE.

